Convert speaker spikes from quadrupod to tripod
 

In article , "Meindert Sprang" wrote:
"UnsteadyKen" wrote in message
...




oopths

http://www.btinternet.com/~unsteadyken/mycrap.JPG

The brandname "IKEA" springs to mind....


Hey, I got one of those. Its really nice. I had a 31 inch crt tv on it.
Heavy !!

greg

Convert speaker spikes from quadrupod to tripod
 

"James Harris" wrote

My speakers have four spikes beneath them which makes it a pain to
move the speakers even slightly as the length of at least one spike
has to be adjusted to make all four rest on/in the floor. (The floor
is solid - maybe concrete - and not wood.)

"concrete"... is a very good vibration sink compared to
wood, for example.

If this is a carpet and pad installation over concrete it is
unlikely that spikes will work anyway, IME.


Anyone heard of a kit to convert four spikes to three?

Some speaker manufactures use only three spikes. Two
in the front and one in the back. This makes adjusting
tweeter face rake adjustments much easier too.


It would have to fit beneath the existing arrangement as I don't
want to modify the speakers (which are Dynaudio Audience
62 floorstanders).

Spike sources, check out:
http://www.madisound.com/catalog/ind...?cPath=404_121
http://www.musicdirect.com/category/49


Quality casters make a good alternative (measured
reduction in cabinet vibration) to speaker spikes, IME.
They also give you the ability to move the speakers
about freely.


I'm thinking of something like a heavy duty plate with four solid
fittings above and three below. I suppose an alteration to the sound
is inevitable but would avoid scrap the idea if it has too much
effect.


An alternative is to put paving slabs on top of the carpet beneath the
speakers. They should be heavy enough to not move and also present a
more uniform surface for the speakers though even that would not be
perfect. The slight problem here is the slabs sold by the local stores
are fairly lightweight.

This is the least desirable of the alternatives you've site so far.

Oct, 2000 , TAS - What's Wrong With Speakers
by R.E. Greene

"But as soon as a speaker gets an input signal, it
starts doing things it shouldn't and starts making
noise, not just the music it should be making. Cones
and surrounds flexing, mechanical structures
vibrating, cabinets flexing in unpredicted and
unpredictable ways, air flowing turbulently,
electrostatic diaphragms vibrating chaotically
on the scale of small areas even if they are moving
regularly on a large scale, such sources of noise
are everywhere."

"How much noise are we talking about here?
A lot, a whole lot by the standards of noise
levels in electronics and recording systems.
Speaker noise appears only 20 to 30 dB down
from signal in some cases, and even the
cleanest speakers I know do not get the noise
down much more than 55 dB or so."

Convert speaker spikes from quadrupod to tripod
 

In article , Powell
wrote:

"James Harris" wrote

My speakers have four spikes beneath them which makes it a pain to
move the speakers even slightly as the length of at least one spike
has to be adjusted to make all four rest on/in the floor. (The floor
is solid - maybe concrete - and not wood.)

"concrete"... is a very good vibration sink compared to wood, for
example.

What size/shape/structure/type of "concrete" do you have in mind, and what
do you mean by "sink"? Can you point pun me at measurements to support
what you say?

If this is a carpet and pad installation over concrete it is unlikely
that spikes will work anyway, IME.

"Work" means?...

Quality casters make a good alternative (measured reduction in cabinet
vibration) to speaker spikes, IME.

Ah. Thanks, can you give a URL for the measurements you are referring to
here?

Slainte,

Jim

--
Electronics http://www.st-and.ac.uk/~www_pa/Scot...o/electron.htm
Armstrong Audio http://www.audiomisc.co.uk/Armstrong/armstrong.html
Audio Misc http://www.audiomisc.co.uk/index.html

Convert speaker spikes from quadrupod to tripod
 

Keith G wrote:

Here's a couple of very dirty extracts, complete with hiss, hum, the
'needle down' bang and even the sound of me closing the door, to give
you an approximate *recorded* idea of what I like soundwise:

http://www.moirac.adsl24.co.uk/shown...phtExtract.mp3

What's the tune/artist in this first extract, Keith?


--
Wally
www.wally.myby.co.uk
Stress: You wake up screaming and realise you haven't fallen asleep yet.

Convert speaker spikes from quadrupod to tripod
 

"Dave Plowman (News)" wrote in message
...
In article ,
Keith G wrote:
The Rogers 'BBC Studio Monitors' I had here a while back were
'thinwall/resonating' types and sounded very good indeed,

Probably the same family as the BC1 - from an original BBC design
study.

apart from the rasping bass unit I couldn't cure - without spending a
lot of money and maybe changing the speakers characteristics too
much, in any case....

I suppose you tried inverting the driver?


Sure - first port of call after turning the whole box upside down; then
I tried all sorts of fiddling about before I spoke to DK Loudspeakers:

http://www.moirac.adsl24.co.uk/showntell/DSCN1476.JPG

If it was like the original BC1, the actual power handling was very low.
About 25 watts.


Yes, exactly so:

http://www.moirac.adsl24.co.uk/shown...ogersLabel.JPG

Convert speaker spikes from quadrupod to tripod
 

"Jim Lesurf" wrote

My speakers have four spikes beneath them which makes it a pain to
move the speakers even slightly as the length of at least one spike
has to be adjusted to make all four rest on/in the floor. (The floor
is solid - maybe concrete - and not wood.)

"concrete"... is a very good vibration sink compared to wood, for
example.

What size/shape/structure/type of "concrete" do you have in mind, and what
do you mean by "sink"? Can you point pun me at measurements to support
what you say?

In theory, all things being equal (concrete's mass will convert
more sound energy to heat more efficiently as compared to wood
which tends to resonate. Many high end speaker manufactures
like Wilson Audio, B&W, Egglestonworks and others
construct speaker cabinets out of synthetic compounds,
stone, or aluminum for this reason., for example. Of course
in practice it is more a complicated subject because of Q
value effects.

Meausrements... yes, I have data. What is your specific
question?


If this is a carpet and pad installation over concrete it is unlikely
that spikes will work anyway, IME.

"Work" means?...

For maximum effectiveness spikes should not be run
through any type of carpet interface (carpet/foam).
If you have high quality carpet, spikes just won't
penetrate the carpet/pad substrate. The tightly
woven jute backing and under pad is the problem.
The conical shape of spikes simply will not couple
to the sub-floor... and I mean tightly. While it might
appear (feel) to you that your spikes are firmly in
they are still supported by the carper/pad. Sound
pressure measurements and auditioning indicate
only a poor improvement in fidelity if used in this way.


Quality casters make a good alternative (measured
reduction in cabinet vibration) to speaker spikes, IME.

Ah. Thanks, can you give a URL for the measurements
you are referring to here?

I've not placed this data on the web.

Convert speaker spikes from quadrupod to tripod
 

"Wally" wrote in message
...
Keith G wrote:

Here's a couple of very dirty extracts, complete with hiss, hum, the
'needle down' bang and even the sound of me closing the door, to give
you an approximate *recorded* idea of what I like soundwise:

http://www.moirac.adsl24.co.uk/shown...phtExtract.mp3

What's the tune/artist in this first extract, Keith?


It's the 'Honeysuckle Suite: I. Sugar Maple/II. Elm/III. Sweetgum' - on side
2 of the Rachel's 'Selenography' double album. I've got the vinyl (needless
to say) but it's available on CD for notta lotta money:

http://www.amazon.co.uk/Selenography.../dp/B00000IR6T


Played, apparently, by the eponymous Rachel Grimes on a 1985 Zuckerman
French double-manual harpsichord. You can buy a kit and build one yourself
if you're up to it:

http://zhi.net/instr/FR63ZHI-K.shtml

:-)

Second extract (if I've got it right - I just plonked the needle down here
and there and strung a selection together in one go) is 'Mysterious
Disappearance Of Louis LePrince'...(??)

Convert speaker spikes from quadrupod to tripod
 

"UnsteadyKen" wrote in message
m...
In article ,
says...
Here's a quick snap:

http://www.moirac.adsl24.co.uk/showntell/Triangular.jpg

I see we shared the same taste in upmarket equipment racks and
meticulous wiring practice.





:-)

I've got a number of these racks - they were cheap as chips from Argos and
they're very strong!

(They figure in every shot of a kitchen I've seen lately and I've even seen
them posing as 'fixtures' in a submarine in some tossy film!!)

Convert speaker spikes from quadrupod to tripod
 

Powell wrote:

For maximum effectiveness spikes should not be run
through any type of carpet interface (carpet/foam).
If you have high quality carpet, spikes just won't
penetrate the carpet/pad substrate. The tightly
woven jute backing and under pad is the problem.
The conical shape of spikes simply will not couple
to the sub-floor... and I mean tightly.

You don't think that spikes will penetrate Jute? But that doesn't mean it wouldn't be fun trying.
Anyway, you are wrong. I just tried pushing a Tannoy spike through a piece of decent carpet
and underlay into my finger. It didn't take much force at all.

--
Eiron.

Convert speaker spikes from quadrupod to tripod
 

Keith G wrote:

What's the tune/artist in this first extract, Keith?

It's the 'Honeysuckle Suite: I. Sugar Maple/II. Elm/III. Sweetgum' -
on side 2 of the Rachel's 'Selenography' double album. I've got the
vinyl (needless to say) but it's available on CD for notta lotta
money:

http://www.amazon.co.uk/Selenography.../dp/B00000IR6T

Thanks for that - will lay me hands on it sooner or later.


Played, apparently, by the eponymous Rachel Grimes on a 1985 Zuckerman
French double-manual harpsichord. You can buy a kit and build one
yourself if you're up to it:

http://zhi.net/instr/FR63ZHI-K.shtml

:-)

Er, no. :)

Wouldn't mind a shot of one, though. The German double manual in the for
sale (or sold) section appeals to me more - not keen on the mega-ornate
styling.


--
Wally
www.wally.myby.co.uk
Things are always clearer in the cold, post-upload light.